Battery assembly

Abstract

The utility model relates to the field of energy storage equipment, and discloses a battery assembly which comprises a shell and a cover body, a first containing cavity is formed in the shell, a first opening is formed in one end, in the first direction, of the shell, the first opening is communicated with the first containing cavity, and the cover body is connected with the shell through a first connecting piece and closes the first opening; the battery module is located in the first containing cavity, a first connecting face is formed in the position, close to the first opening, of the battery module, and a plurality of first connecting positions are formed on the first connecting face; the circuit board is provided with a plurality of second connecting positions, and the circuit board is located between the cover body and the first connecting surface; and the busbar is positioned between the first connecting surface and the circuit board, and is respectively connected with the first connecting position and the second connecting position. Provided is a battery assembly which is simplified in layout and operation.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment, and in particular to a battery module. Background Technology

[0002] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes, forming a cup, tank, or other container or composite container that generates an electric current. It has a positive and a negative electrode. With technological advancements, the term "battery" now generally refers to any small device that generates electrical energy, such as a solar cell. The main performance parameters of a battery include electromotive force, capacity, specific energy, and resistance. Using batteries as an energy source provides a stable voltage, stable current, long-term stable power supply, and minimal susceptibility to external influences. Batteries are simple in structure, portable, easy to charge and discharge, unaffected by external climate and temperature, and offer stable and reliable performance, playing a significant role in various aspects of modern life.

[0003] Existing batteries are typically connected to other components via wiring harnesses, requiring space to be reserved within the battery pack to accommodate these harnesses, further complicating the layout. Furthermore, the frequent connection and disconnection of the wiring harnesses during assembly and disassembly complicates the operation. Utility Model Content

[0004] This application primarily addresses the technical problems of complex layout and operation caused by connecting batteries to other components via wiring harnesses in existing technologies. It provides a battery assembly with simplified layout and operation.

[0005] To address the aforementioned technical problems, this application provides a battery assembly, characterized in that the battery assembly comprises,

[0006] The housing and the cover are provided. The housing has a first receiving cavity. One end of the housing along a first direction is provided with a first opening. The first opening communicates with the first receiving cavity. The cover is connected to the housing through a first connector and closes the first opening.

[0007] A battery module is located in the first receiving cavity. A first connecting surface is formed on the battery module near the first opening, and a plurality of first connecting positions are formed on the first connecting surface.

[0008] A circuit board having a plurality of second connection positions, the circuit board being located between the cover and the first connection surface;

[0009] A busbar is located between the first connection surface and the circuit board, and the busbar is connected to the first connection position and the second connection position respectively.

[0010] In one possible implementation, the battery module includes,

[0011] A battery cell assembly, wherein the battery cell assembly is formed by arranging two or more battery cells along a second direction, and a first buffer layer is formed between two adjacent battery cells;

[0012] The first bracket is used to enclose the battery cell assembly.

[0013] A second buffer layer is formed between the battery cell assembly and the housing.

[0014] In one possible embodiment, the battery assembly further includes,

[0015] A first positioning element is located between the busbar and the first connection surface. The first positioning element is used to limit the position of the busbar in a second direction and a third direction to form a stable connection between the busbar and the first connection surface.

[0016] In one possible implementation, the first positioning element includes,

[0017] Positioning the motherboard;

[0018] A first positioning hole is provided through the positioning motherboard along the first direction. The first positioning hole is corresponding to the first connection position. The busbar is located in the first positioning hole to form a limit on the busbar along the second direction and the third direction.

[0019] The first positioning post is connected to the positioning motherboard and extends along the first direction into the second positioning hole of the busbar to form a limit on the busbar along the second direction and the third direction.

[0020] In one embodiment, the busbar is electrically connected to the circuit board via a second connector, the second connector including a first connection structure and a second connection structure, the first connection structure being disposed on the busbar and the second connection structure being disposed on the circuit board.

[0021] In one embodiment, both the first connecting structure and the second connecting structure are elongated structures. The first connecting structure is a columnar structure arranged along the first direction, and the second connecting structure is a sleeve structure arranged along the first direction. The second connecting structure has a connecting cavity, and the first connecting structure is located within the connecting cavity of the second connecting structure.

[0022] In one possible embodiment, the second connector further includes,

[0023] A first elastic structure is arranged in the connecting cavity along a first direction. The first elastic structure is located between the first connecting structure and the second connecting structure, and the first elastic structure abuts against the first connecting structure and the second connecting structure respectively.

[0024] In one embodiment, the first connection structure consists of a positive conductive post and a negative conductive post, and the second connection structure consists of a positive conductive ring and a negative conductive ring, wherein the positive conductive post is connected to the positive conductive ring, and the negative conductive post is connected to the negative conductive ring.

[0025] In one possible implementation, the circuit board includes,

[0026] Circuit board;

[0027] A positive power conductive component and a control switch are provided. Both the positive power conductive component and the control switch are connected to the main circuit board. The control switch is connected to both the positive power conductive component and the positive conductive ring. The control switch is used to control the on / off connection between the positive power conductive component and the positive conductive ring.

[0028] The circuit includes a negative power conductive component and a shunt, both of which are connected to the main circuit board. The shunt is connected to both the negative power conductive component and the negative conductive ring, and is used to measure the main circuit current of the circuit board.

[0029] In one possible embodiment, the battery assembly further includes,

[0030] A heat detection device is located between the busbar and the circuit board, and is electrically connected to the circuit board;

[0031] A thermal pad is located between the busbar and the heat detection element to transfer heat from the busbar to the heat detection element.

[0032] In one possible embodiment, the battery assembly further includes,

[0033] An elastic conductive element is located between the busbar and the circuit board. The elastic conductive element is electrically connected to both the busbar and the circuit board, and drives the busbar to abut against the first connection position.

[0034] In one possible embodiment, the battery assembly further includes,

[0035] The circuit board is fixedly connected to the cover via the third connector.

[0036] Compared to existing technologies, the battery assembly of this application uses a busbar instead of a wiring harness. The busbar is connected to the battery module and circuit board by abutting, which simplifies the connection steps between the battery module and the circuit board. At the same time, the busbar is a flat structure, which eliminates the need to reserve space for the busbar separately, further simplifying the layout within the battery assembly. Attached Figure Description

[0037] Appendix Figure 1 This is a schematic diagram of a battery assembly according to this application;

[0038] Appendix Figure 2 This is a schematic diagram of a battery module structure according to this application;

[0039] Appendix Figure 3 This is a schematic diagram of a structure between the battery module and the first positioning component in this application;

[0040] Appendix Figure 4 This is a schematic diagram of a structure between the cover and the circuit board in this application;

[0041] Appendix Figure 5 This is a schematic diagram of a structure between the bus, circuit board and first positioning element of this application;

[0042] Appendix Figure 6 This is another structural diagram of the bus, circuit board and first positioning element in this application.

[0043] Explanation of the labels in the diagram:

[0044] X, first direction; Y, second direction; Z, third direction;

[0045] 10. Battery components;

[0046] 100. Shell; 110. First receiving cavity; 120. First opening;

[0047] 200. Cover; 210. First connector; 211. Third connector; 212. Fourth connector; 220. Guide.

[0048] 300, Battery module; 310, First connecting surface; 311, First connecting position; 320, Battery cell; 330, First buffer layer; 340, First bracket.

[0049] 400 Circuit board; 410 Second connection position; 420 Circuit main board; 430 Positive power conductive component; 440 Control switch; 450 Negative power conductive component; 460 Shunt; 470 Heat detection component; 480 Elastic conductive component;

[0050] 500, busbar; 510, second positioning hole; 520, thermal pad;

[0051] 600, First positioning component; 610, Positioning main board; 620, First positioning hole; 630, First positioning post;

[0052] 700, Second connector; 710, First connection structure; 711, Positive conductive post; 712, Negative conductive post; 720, Second connection structure; 721, Positive conductive ring; 722, Negative conductive ring; 730, First elastic structure;

[0053] 800. Third connector;

[0054] 900, Second positioning element; 910, First positioning structure; 920, Second positioning structure. Detailed Implementation

[0055] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] Existing technologies present technical problems such as complex layout and operational complexity when batteries are connected to other components via wiring harnesses.

[0057] Therefore, this application provides a battery assembly, characterized in that the battery assembly comprises,

[0058] The housing and the cover are provided. The housing has a first receiving cavity. One end of the housing along a first direction is provided with a first opening. The first opening communicates with the first receiving cavity. The cover is connected to the housing through a first connector and closes the first opening.

[0059] A battery module is located in the first receiving cavity. A first connecting surface is formed on the battery module near the first opening, and a plurality of first connecting positions are formed on the first connecting surface.

[0060] A circuit board having a plurality of second connection positions, the circuit board being located between the cover and the first connection surface;

[0061] A busbar is located between the first connection surface and the circuit board, and the busbar is connected to the first connection position and the second connection position respectively.

[0062] Example 1:

[0063] Please refer to the attached document. Figure 1 To be continued Figure 6 The diagram illustrates a specific embodiment of the battery module 10 of this application. In the prior art, batteries are connected to other components via wiring harnesses to form the battery module 10. Existing battery modules 10 often require a large number of wiring harnesses for electrical connections, necessitating the allocation of space within the battery module 10 to accommodate these harnesses. This complicates the layout of the battery module 10, and the arrangement of the wiring harnesses within the battery module 10 is also a challenge. Connecting the battery module and other components within the battery module 10 via wiring harnesses requires frequent connection and disconnection of the harnesses, complicating operations and further increasing the assembly time of the battery module 10.

[0064] Please refer to the attached document. Figure 1 To be continued Figure 6 As shown, the first direction X of this application refers to the height direction of the battery assembly 10, that is, the direction of the battery assembly 10 from top to bottom or from bottom to top. In this application, the cover 200 is disposed above the housing 100, and the housing 100 is disposed below the cover 200. The second direction Y of this application refers to the width direction of the battery assembly 10, that is, the direction of the battery assembly 10 from front to back or from back to front. In this application, the negative electrode power conductive element 450 is disposed in front of the positive electrode power conductive element 430, and the positive electrode power conductive element 430 is disposed behind the negative electrode power conductive element 450. The third direction Z of this application refers to the length direction of the battery assembly 10, that is, the direction of the battery assembly 10 from left to right or from right to left. In this application, the positive electrode conductive ring 721 is disposed to the left of the negative electrode conductive ring 722, and the negative electrode conductive ring 722 is disposed to the right of the positive electrode conductive ring 721.

[0065] Appendix Figure 1 This is a schematic diagram of the battery module 10 of this application. Please refer to the attached diagram. Figure 1As shown, the battery assembly 10 of this application includes a housing 100 and a cover 200. The housing 100 and the cover 200 are arranged sequentially along the first direction X. The housing 100 has a first receiving cavity 110, and the cover 200 has a second receiving cavity. The first receiving cavity 110 of the housing 100 is used to receive the battery module 300. One end of the housing 100 along the second direction Y is provided with a first opening 120, which communicates with the first receiving cavity 110. The battery module 300 enters and exits the first receiving cavity 110 through the first opening 120. The cover 200 is connected to the housing 100 through a first connector 210. After the cover 200 is connected to the housing 100, the first receiving cavity 110 communicates with the second receiving cavity. Furthermore, the cover 200 is connected to the first opening 120 of the housing 100 by covering, so as to close the first opening 120. After the first opening 120 is closed, the other components in the battery assembly 10 are all housed in the first receiving cavity 110 or the second receiving cavity.

[0066] In one embodiment, both the housing 100 and the cover 200 are rectangular structures to accommodate the shape of the battery module 300. In this application, the rectangular structure of the housing 100 and the cover 200 is merely one implementation of the cover 200 and housing 100.

[0067] In one embodiment, the cover 200 is detachably connected to the housing 100 via a first connector 210. Further, the first connector 210 includes a third connecting structure 211 and a fourth connecting structure 212, which are detachably connected. The third connecting structure 211 is disposed on the housing 100, and the fourth connecting structure 212 is disposed on the cover 200. Further, the cover 200 has the fourth connecting structure 212 on both sides along the second direction Y, and the housing 100 has the third connecting structure 211 on both sides along the second direction Y. The third connecting structure 211 and the fourth connecting structure 212 are snap-fit ​​structures; the third connecting structure 211 is composed of a snap-fit ​​block, and the fourth connecting structure 212 is composed of a snap-fit ​​groove. Besides being a snap-fit ​​structure, the third connecting structure 211 and the fourth connecting structure 212 can also be an insertion structure.

[0068] Please refer to the attached document. Figure 1As shown, the battery assembly 10 of this application also includes a battery module 300, which is composed of one or more battery cells 320. The battery module 300 is located within the first receiving cavity 110 of the housing 100. A first connecting surface 310 is provided on one side of the battery module 300 along the first direction X, near the first opening 120. A first connecting position 311 is provided on the first connecting surface 310, through which the battery module 300 outputs electrical energy. In the battery module 300 of this application, the first connecting position 311 refers to the location where the battery module 300 connects to other components and outputs electrical energy.

[0069] In one embodiment, a plurality of first connection positions 311 are arranged on the first connection surface 310.

[0070] Please refer to the attached document. Figure 1 As shown, the battery assembly 10 of this application also includes a circuit board 400, which has a plurality of second connection positions 410. The second connection positions 410 on the circuit board 400 are connected to the first connection positions 311 in the battery module 300 to realize the output of electrical energy in the battery module 300 and the detection of relevant data in the battery module 300. After the cover 200 is connected to the housing 100, the circuit board 400 is located between the cover 200 and the first connection surface 310.

[0071] In one embodiment, the circuit board 400 is fixedly connected to the cover 200 to facilitate the assembly between the circuit board 400 and the battery module 300.

[0072] In one embodiment, the circuit board 400 is provided with two connection positions, namely a positive connection position and a negative connection position.

[0073] Please refer to the attached document. Figure 1 As shown, the battery assembly 10 of this application also includes a busbar 500, which is made of conductive material. The busbar 500 is located between the first connecting surface 310 and the circuit board 400. The busbar 500 is a plate-like structure. The busbar 500 extends in the second direction Y and the third direction Z. The busbar 500 has a certain thickness in the first direction X. Therefore, the space occupied by the busbar 500 in the first receiving cavity 110 is small. There is no need to set up a separate space for the busbar 500. It is only necessary to add a certain thickness in the first receiving cavity 110 along the first direction X. The first connection point 311 is connected to the second connection point 410 via the busbar 500. The busbar 500 is connected to the first connection point 311 and the second connection point 410 by abutment connection. That is, as long as the busbar 500 is placed in a suitable position, the first connection point 311 and the second connection point 410 can be connected after the circuit board 400 is installed, so as to optimize the installation steps of the battery assembly 10 and reduce the installation time of the battery assembly 10.

[0074] In one embodiment, the busbar 500 of this application includes several blocks, and the several blocks of busbar 500 are all connected to the first connection position 311 to realize the series connection of each cell 320 in the battery module 300.

[0075] Please refer to the attached document. Figure 1 As shown, the battery assembly 10 of this application includes a first positioning member 600, which is made of insulating material. The first positioning member 600 is located between the busbar 500 and the first connecting surface 310. After the cover 200 is connected to the housing 100, the first positioning member 600 abuts against the busbar 500 and the first connecting surface 310 respectively. The first connecting member 210 is used to limit the busbar 500 in the second direction Y and the third direction Z. The limitation of the busbar 500 in the first direction X is achieved by the cover 200 being connected to the housing 100, thereby achieving relative fixation of the position of the busbar 500, so as to achieve a stable connection between the busbar 500 and the first connecting position 311.

[0076] Please refer to the attached document. Figure 1 As shown, the battery assembly 10 of this application includes a second positioning member 900. The second positioning member 900 includes a first positioning structure 910 and a second positioning structure 920. The first positioning structure 910 is disposed on the housing 100, and the second positioning structure 920 is disposed on the first positioning member 600 and the circuit board 400. The cooperation between the first positioning structure 910 and the second positioning structure 920 is used to determine the relative position between the circuit board 400 and the first positioning member 600 and the housing 100, so as to further facilitate the installation of the circuit board 400 and the first positioning member 600.

[0077] In one embodiment, the first positioning structure 910 is an elongated rib disposed within the housing 100, and the first positioning structure 910 is disposed along the first direction X. The second positioning structure 920 is a positioning groove disposed on the first positioning member 600 and the circuit board 400, and the first positioning structure 910 and the second positioning structure 920 are correspondingly disposed, with the first positioning structure 910 located within the second positioning structure 920 in specific use. Further, the housing 100 is provided with the first positioning structure 910 on both sides along the second direction Y, and the circuit board 400 and the first positioning member 600 are provided with the second positioning structure 920 on both sides along the second direction Y.

[0078] Appendix Figure 2 This is a structural schematic diagram of the battery module 300 of this application. Please refer to the attached diagram. Figure 2 As shown, the battery module 300 includes a cell assembly, which consists of two or more cells 320 arranged side by side, and the arrangement direction of the cells 320 in the battery module 10 is set along the second direction Y.

[0079] In one embodiment, cell 320 is a lithium battery or a sodium battery.

[0080] Please refer to the attached document. Figure 2 As shown, the battery module 300 includes a first bracket 340. After two or more battery cells 320 are arranged along the second direction Y, the battery module 300 is provided with a first bracket 340 at both ends along the second direction Y, and the first bracket 340 encloses the two or more battery cells 320. The first bracket 340 is made of insulating material, and the first bracket 340 forms a semi-enclosed state for the battery cells 320. The enclosing surface formed by the first bracket 340 for the battery cells 320 is the surface at both ends along the first direction X of the battery module 300.

[0081] Please refer to the attached document. Figure 2 As shown, the battery module 300 includes a first buffer layer 330, which is disposed between two battery cells 320 and also between the first support 340 and the battery cells 320. The first buffer layer 330 is made of foam material and is used to absorb tolerances during assembly, as well as to provide insulation and heat insulation.

[0082] Please refer to the attached document. Figure 2 As shown, the battery module 300 also includes a second buffer layer. During installation, the second buffer layer is positioned between the battery cell assembly and the housing 100. This second buffer layer absorbs tolerances during assembly and also serves as insulation and heat insulation. In one embodiment, the second buffer layer is a potting compound.

[0083] Appendix Figure 3 This is a schematic diagram illustrating a structure between the battery module 300 and the first positioning member 600 in this application. Please refer to the attached diagram. Figure 3 As shown, the first surface of the battery module 300 of this application is covered with a first positioning member 600. The first positioning member 600 includes a positioning motherboard 610. The positioning structures in the first positioning member 600 are all disposed on the positioning motherboard 610. The positioning structures in the first positioning member 600 are used to realize the positioning of the busbar 500.

[0084] Please refer to the attached document. Figure 3 As shown, the first positioning member 600 also includes a first positioning hole 620. The motherboard has a through-hole 620 along the first direction X, and the first positioning hole 620 corresponds to the first connection position 311 on the battery module 300. In this application, the first connection position 311 has a certain thickness in the first direction X, and the first connection position 311 extends into the first positioning hole 620. At the same time, the busbar 500 is located in the first positioning hole 620, and the busbar 500 and the first positioning hole 620 are in clearance fit. The first positioning hole 620 forms a limit for the busbar 500 in the second direction Y and the third direction Z.

[0085] Please refer to the attached document. Figure 3As shown, the first positioning member 600 also includes a first positioning post 630. The first positioning post 630 is set along the first direction X and is connected to the main board. The first positioning post 630 extends along the first direction X into the second positioning hole 510 of the busbar 500. The cooperation between the first positioning post 630 and the second positioning hole 510 forms the limit of the busbar 500 along the second direction Y and the third direction Z.

[0086] Appendix Figure 4 This is a schematic diagram of a structure between the cover 200 and the circuit board 400 of this application. (Attached) Figure 5 This is a schematic diagram of a structure between the bus 500, circuit board 400, and first positioning member 600 of this application. Please refer to the attached diagram. Figure 4 and appendix Figure 5 As shown, the busbar 500 of this application is electrically connected to the circuit board 400 via the second connector 700 to realize the transmission of electrical energy from the battery module 300. The second connector 700 includes a first connection structure 710 and a second connection structure 720, which are connected to each other. The first connection structure 710 is disposed on the busbar 500, and the second connection structure 720 is disposed on the circuit board 400. In this application, the connection between the first connection structure 710 and the second connection structure 720 is either plug-in or snap-fit.

[0087] In one embodiment, the connection between the first connecting structure 710 and the second connecting structure 720 is a plug-in connection. Both the first connecting structure 710 and the second connecting structure 720 are elongated structures. The first connecting structure 710 is a columnar structure arranged along the first direction X, and the second connecting structure 720 is a sleeve structure arranged along the first direction X. The second connecting structure 720 has a connecting cavity that extends through the second connecting structure 720 along the first direction X. The first connecting structure 710 is located within the connecting cavity of the second connecting structure 720 to achieve a contact connection between the first connecting structure 710 and the second connecting structure 720.

[0088] Furthermore, the first connection structure 710 is composed of a positive conductive post 711 and a negative conductive post 712, and the second connection structure 720 is composed of a positive conductive ring 721 and a negative conductive ring 722. The positive conductive post 711 is connected to the positive conductive ring 721, and the negative conductive post 712 is connected to the negative conductive ring 722.

[0089] Please refer to the attached document. Figure 4 and appendix Figure 5As shown, the circuit board 400 includes a main circuit board 420, which is the main structure of the circuit board 400 of this application. All other components in the circuit board 400 are mounted on the main circuit board 420. The circuit board 400 also includes a positive power conductive element 430 and a control switch 440. Both the positive power conductive element 430 and the control switch 440 are connected to the main circuit board 420. The control switch 440 is connected to both the positive power conductive element 430 and the positive conductive ring 721 of the positive conductive element 430, and is used to control the on / off connection between the positive power conductive element 430 and the positive conductive ring 721. The circuit board 400 also includes a negative power conductive element 450 and a shunt 460. Both the negative power conductive element 450 and the shunt 460 are connected to the main circuit board 420. The shunt 460 is connected to both the negative power conductive element 450 and the negative conductive ring 722, and is used to measure the main circuit current of the circuit board 400.

[0090] In one embodiment, the cover 200 is further provided with a guide 220, and the negative power conductive element 450 and the positive power conductive element 430 extend along the first direction X and are located in the guide 220. The guide 220 is used to protect the negative power conductive element 450 and the positive power conductive element 430.

[0091] Please refer to the attached document. Figure 4 and appendix Figure 5 As shown, the battery assembly 10 also includes a heat detection element 470 and a thermal pad 520. The heat detection element 470 is located between the busbar 500 and the circuit board 400, and is electrically connected to the circuit board 400. The thermal pad 520 is located between the busbar 500 and the heat detection element 470 to transfer heat from the busbar 500 to the heat detection element 470.

[0092] In one embodiment, the thermal pad 520 has a thermal conductivity ≥3W / mk and a voltage withstand capability ≥3kV.

[0093] In one embodiment, the heat detection element 470 is a thermistor, which converts the heat transmitted from the bus 500 to the heat detection element 470 into a resistance signal, so as to realize the measurement of the heat on the bus 500 and provide data support for subsequent operations.

[0094] Please refer to the attached document. Figure 4 and appendix Figure 5As shown, the battery assembly 10 also includes an elastic conductive element 480, which is located between the busbar 500 and the circuit board 400. The elastic conductive element 480 is electrically connected to both the busbar 500 and the circuit board 400, and drives the busbar 500 to abut against the first connection position 311, thereby achieving a tight connection between the busbar 500 and the first connection position 311 and enhancing the reliability of the connection. In this application, each busbar 500 is provided with at least one elastic conductive element 480, and the circuit board 400 is connected to the busbar 500 through an elastic guide 220, so as to meet the requirements of the equalization circuit while detecting the voltage of the battery cell 320.

[0095] Appendix Figure 6 This is another structural diagram of the bus 500, circuit board 400, and first positioning member 600 in this application. Please refer to the attached diagram. Figure 6 As shown, the second connector 700 of this application further includes a first elastic structure 730. The first elastic structure 730 is arranged in the connecting cavity along the first direction X. The first elastic structure 730 is located between the first connecting structure 710 and the second connecting structure 720, and the first elastic structure 730 abuts against the first connecting structure 710 and the second connecting structure 720 respectively, so as to realize the connection between the first connecting structure 710 and the second connecting structure 720 while enhancing the connection strength between the first connecting structure 710 and the second connecting structure 720.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0098] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery assembly, comprising: The battery assembly comprises, a shell, a cover, the shell has a first accommodating cavity, the shell is provided with a first opening at one end along a first direction, the first opening is communicated with the first accommodating cavity, the cover is connected with the shell through a first connecting piece and closes the first opening; a battery module, the battery module is located in the first accommodating cavity, the battery module is formed with a first connecting surface near the first opening, and a plurality of first connecting positions are formed on the first connecting surface; a circuit board, the circuit board is provided with a plurality of second connecting positions, and the circuit board is located between the cover and the first connecting surface; a busbar, the busbar is located between the first connecting surface and the circuit board, and the busbar is connected with the first connecting position and the second connecting position respectively.

2. The battery assembly of claim 1, wherein, The battery module comprises, a battery cell assembly, the battery cell assembly is formed by arranging two or more battery cells along a second direction, and a first buffer layer is formed between two adjacent battery cells; a first support, the battery cell assembly is wrapped with a first support; a second buffer layer, a second buffer layer is formed between the battery cell assembly and the shell.

3. The battery assembly of claim 1, wherein, The battery assembly further comprises, a first positioning piece, the first positioning piece is located between the busbar and the first connecting surface, and the first positioning piece is used to limit the position of the busbar in the second direction and the third direction to form stable connection between the busbar and the first connecting position.

4. The battery assembly of claim 3, wherein, The first positioning piece comprises, a positioning main plate; a first positioning hole, a first positioning hole is provided in the first direction through the positioning main plate, the first positioning hole is provided corresponding to the first connecting position, and the busbar is located in the first positioning hole to limit the position of the busbar in the second direction and the third direction; a first positioning column, the first positioning column is connected with the positioning main plate, and the first positioning column extends to the second positioning hole of the busbar in the first direction to limit the position of the busbar in the second direction and the third direction.

5. The battery assembly of claim 3, wherein, The busbar is electrically connected with the circuit board through a second connecting piece, the second connecting piece comprises a first connecting structure and a second connecting structure, the first connecting structure is arranged on the busbar, and the second connecting structure is arranged on the circuit board.

6. The battery assembly of claim 5, wherein, The first connecting structure and the second connecting structure are both long strip structures, the first connecting structure is a column structure arranged along the first direction, the second connecting structure is a sleeve structure arranged along the first direction, the second connecting structure has a connecting cavity, and the first connecting structure is located in the connecting cavity of the second connecting structure.

7. The battery assembly of claim 6, wherein, The second connecting piece further comprises, a first elastic structure, the first elastic structure is arranged in the connecting cavity along the first direction, the first elastic structure is located between the first connecting structure and the second connecting structure, and the first elastic structure abuts against the first connecting structure and the second connecting structure respectively.

8. The battery assembly of claim 6, wherein, The first connecting structure is composed of a positive conductive column and a negative conductive column, the second connecting structure is composed of a positive conductive ring and a negative conductive ring, the positive conductive column is connected with the positive conductive ring, and the negative conductive column is connected with the negative conductive ring.

9. The battery assembly of claim 8, wherein, The circuit board comprises, a circuit mainboard; a positive power conductive member and a control switch, the positive power conductive member and the control switch are connected with the circuit mainboard, the control switch is connected with the positive power conductive member and the positive conductive ring respectively, and the control switch is used for controlling the on-off of the positive power conductive member and the positive conductive ring; a negative power conductive member and a shunt, the negative power conductive member and the shunt are connected with the circuit mainboard, the shunt is connected with the negative power conductive member and the negative conductive ring respectively, and the shunt is used for measuring the main loop current of the circuit board.

10. The battery assembly of claim 1, wherein, The battery assembly further comprises, a heat detection member, the heat detection member is located between the busbar and the circuit board, and the heat detection member is electrically connected with the circuit board; a heat conduction pad, the heat conduction pad is located between the busbar and the heat detection member, and the heat conduction pad is used for transmitting the heat of the busbar to the heat detection member.

11. The battery assembly of claim 1, wherein, The battery assembly further comprises, a flexible conductive member, the flexible conductive member is located between the busbar and the circuit board, the flexible conductive member is electrically connected with the busbar and the circuit board respectively, and the flexible conductive member drives the busbar to abut against the first connecting position.

12. The battery assembly of claim 1, wherein, The battery assembly further comprises, a third connecting member, the circuit board is fixedly connected with the cover through the third connecting member.

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